<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<script type="text/javascript" src="../lib/jquery/jquery-1.11.1.js" ></script>
	<style>
		img{
			width: 250px;
			height: 200px;
		}
	</style>
	<script type="text/javascript">
		function big(){
			$('img').css('width',function(){
			});
		}
	</script>
	<body>
		<h1>图片放大缩小</h1>
		<img src="../img/1d.jpg" width: 250px height: 200px><br />
		<input type="button" value="放大" onclick="big()">
		<input type="button" value="缩小" onclick="small()">
	</body>
</html>
